Electric heating system for cars



Oct-16, 19.2 8. .4

- B. o. AUSTIN ELECTRIC HEATING sysmu FOR clms Filed'Aug. 9, 1927INVENTOR 1 Bascum O.Austm V .ATT'oRNEY V735 "I; 1 t ,Otherobjects"oftheinv'entionwilhiflpart,

v Petented octt 1 928. i

v QB'ASGUM oQAU sTIigoiv-EAsm mmsgm PENNSYLVANIA, hssxettoit Townstrike:

V 'HOUSE ELECTRIC}: MANUFACTURING oomrewy, A- eonron 'non E LPENNSYL-*vmm; A l t t 1 t Y ELE RI HE I G SYSTEM FOR CARS.

or' resistoi's' utilizedfol controlling theoper-.

It is com1non ;acti e to ihs'tall the; grids ation of the propelling hotors'ofen electric car under the can. Insuch eases, a eohsideh ableamoimt of energy isydissi'peted inflthe thelresi sto s, In some electmccars; provlsmnilhas been made for utili z mg the Car heatersasres1s'tors- .forjeontrolling the propellihg motors. 5 Thislattersehememey be adopted onlyfw yhenithe atmospheric temperatures arecomparatively ,HQweVer, when the ca heatersere-utilized as motorresistors, provision-should bemaele for proteetir g the system in easea" shortei1 cuit "occurs in one of the heaters. The occur:

l ence of a 'short-eirehit iha heatemieentinned anycorisiclerahlelength'of timeQmay to ma result ill the burning of theo ar;

the casings i rpsl me r sl g "It is alsoan ob eetlof be dengerous totheoccupants oii-thecar It fislan object of'theinvention to provid forgroxindingthe heaters and interrupting the motor circuit upon thefoccurxenloe of a short circuit between the heatr resistors and ciehteinoperatiomw acter that shall qbe simpli to lhstell end efii- .mhe iteptien, H e t the embodiment thereof shown lnthe eecom- "I panyingdfewing end eompfises'thestruettira1 1 feetures the eombinationofelemehts it-hcl.

be:'indieetd in. the claims @Forja fuller understanding ltiorl,reference be hadto theQfOlloWihg detailed de eriptibn, t keni n cnnectio w th the accompanyi'l ig diiewi g, the s in glef figure of whi ch isa' dia gram'matic vietyt ot the, apparams e d circuit connections ofan electriccar-heat mgsystemconstructed in accordance .With theinvention. t

illhesystem illustrated in theclrawing com pi'lses a, senesoundIIlOtOBlI for propelling 4 thec ar a plurality of resistois disposed tobe I oonnected in Circuit withthemotor,releys'12; l

13 and 14 for changing the arrangement of the resistors in the inotoi'eii'euit and dmaster" Controller 15for controlling thefj operation oflit will remain 'eIoSedj QiifitiI the vehicle isxre turned to the ee-shed or some othei'place for perkm'g. v

, "Amenuel'lyopembleswitch26fisllisposed m le meet-tame we 11, 511 a erloadfcoil'disposed emuat the line switch 27 1s "connected in the motor.eiieuit'. The line Swi c er is ellso provided-with Setting e011 2s and"a holding coil 29." Thesetting 601128 is eoncluetoh 3 L extendingfromthe; trolley to r .t lii witllgfl' Theline switeh also viclefesystem of the ahovejindicated'echaie posjethatwill be herin'zi e1 setforth. 1

embodying Men; of electrically] connected eont 'ectfsegmehte 1; 2, 3, 4;ehdfi that are disposed to engage a "set" of controlllfingersf 6, 7,

eftogroonid 25 l l through eohdhetolfo; end the coi trol jfing ei v t. becbnd m 3 Th stltio my cohtaetjmerhbersgtl, 42 and :eonneeted to thetrolley 22 through eohductor he se t g n 2. 101 he movable contactmembers 45, 46 and 47 are connected, through conductors 48, 49 and 50,

Jaseestabriaeaanai to a manually-operated double-throw switch 51' that,isv employed to. connect ,the resistance devices: 1 6, 1'1, 1 8 191 and20inthe1=motor cir cuit. v I

The double-throw switch 51 is provided with three bladeseass and 54and=is connect ed' -tothe motor through conductor '55and to theresistors through conductors 56,57 58 and59. f

It will be noted that the resistors which .are

connected in the motor cireuit'by means "of the double-throw switch ,51are diyided into two. sets of, substantially; equal lohmic ,value.

Tlie'resistors 19 and "20,"forini'ngoneset, are

n; rb 'erjth'a'lti either set; may be connected in the mqto b i c itbymoving t e double-throw witchito .tliepre pr posihdn;

wn-known grid formand areldesigned .to be: mounted in any desired"position; outside, of the, body, Preferably ,urrderneathj the. car, Theresistancefdevices ,Or heaters16, 17. and '8 Me des gn 6 be: locat d W tn the ca-i in order-that they'umay also. actfas heaters forthe'carflwhenvserying to, regulate current upplyi o h mctoh; P I

n smu h .l resistance devices '16,, .17 and ,418 are mounted inthej'carfand ,are conk nec'ted in circuit with'the motor duringccen.

tain periods,,theyintrodnce ,a certain, hfazard.

b" reason vof fthelpossibilityaof .subj ect'ing j to l e r' z cks. or.ihl'w ses nll ill fig1 18;09- uri e Stet i -hek barll pen; th JQQir'reacQLO'. hen. circuitsgin the esistors; .6 6'1 audits;

Tlrerefere, each of th resistnrsfifi, 61am. 68 asbe nprdv dedwithiafprotectweieasmg159 nd ch 'a il gg i's'cbfine itediinia groundingi -itth bughiacQnchldtQr1 Asian adds t l alf 'gua d,1t gr6 ind ngcircuit 1's icon; necte l or'th nipiiingnofl eai nithe lines ya h 27, insuchgmanner that the.lineswitchlwlll'be Opened when urre t t av seshegro ndm ir u t-l. 1 I it i Assuming now} that the switch 26 is closed,and that t e 's itc s5l i hrown or 's; upper p Si idn,. t t l ze theesistors 1'6; 17 jand 'LlS t t cnfi l the urr n Js'uprly e e mama nd thathe ma er, control er 151s. actuated to tsti it a pe ative jp si innearthen. fan energizingcircui t for the linesw tch actuatheedis 'ltabl-'sheld wh h e e ds. from the! trolley 23, through, trolley p 1e;22,;sw1tch 26,, conductqr 4.0, central; fingersfi and 10.,

. bridged; iby eontact s gmeitm .iafndg, i on energizing 'lrl iu zorjthejrela, ,.12'1s ay-betrace fies extending from the ener izedcontact se ment 48,- blade 54eof' the doublethrow switch, con- 7 ductor57, .theresistors 68, 67 and' 66, there- The; rest mm 191 and 2a ma b ror the.

1, through the finger 6, conductor 36, the actuating coilofrelay 12,conductors 39, 32 and 33 to the ground 25. a

The closing ofthe relay, 12. completes the motor circuit which extendsfrom the trolley 22, through conductor 34, holding coil 29, line switch27, conductor '44, the contact members 41, and 45 of theopera t-ingrelay-l2, conductor sistor's 'o fth'e resistance devices, conductor 55,themotor 11 and conductor 24 to ground 25.

A inov'ement ofthe master controller 15 to position 5 effectsengagementofthe contact I se mentfilw-ith the controlifinger 7 .andestab lislies an actuatingfcircuit' for the operating relay 13,- which,when ,c-1osed, ,connects the resistors 16,17 andlSin parallel relation,to secure a predetermined degree of acceleration ofjthe motor. {Whentherelay 13 is closed '8 acircui't isjestablished from theenergiz'edconductor. 44'tlirough the relays12 and 13, conductor 49 switch 51,conductor 5'6'andthe resistorfififtojthe conductor 55. Therefore, thecircuits'thro'ugh the' resistors 66 to 68', inclusive, permit anincrease in the current supplied to'the motor; l v

"From the foregoing, it will be readily understood that the motorina'ybe accelerated step -by'-st ep asthe master controller is op erated;

f with the switch jaws '60, 6'1" and 62. When:

the double th'row switch .is connected 'to the grid resistances 19- and20, if, the vmaster con= troller is mov'edjto positiona, the operatingrelay- 12" will be actuated and all of thegri resistances 19 and'20willbe included in the motor circuit." Under such conditions, .the motorcircuit will extend "from conductor 48; 1 through switclf blade 54;,switch 1' aw 62-, conductor 59, resista nces 20 'and '19; conductor 55,

motor 11 andconductor'24 to ground.

When the controller i'sadvanced-to position b,'the"operating relay 13will be actuated and '115 thegrid resistances 19 and 20 will beplaced inparallelby the. completion of an additional circuit frombondiict'or49ia'ndswitchblade 53.'through; switch jaw :61, conductor '58, re-

s istance 19"to ondacton55;

a Tithe controller is advance dito 'p'osition c,

the operating relayf14 will be actuated, the grid resistances 19" and 20Will' be 'short icir cuited andthemotor 11 will be connected to run atfull speed, byfthe"completionbf"a circuit through-conductor 50', switchblade-52, V

'andcondiictorf24 to ground; c v Whemhe heaters-are"connectedinflthemotor circuit, if one'of the resistors comes into switchfljaw60,'co'nductors'71 and "55, 1notor engagement with a casing 69, anenergizing circuit for the trip coil35 is established which extends.from the energized resistor through the casing 69, conductor? 0,the-trip coil 35 on the line switch and conductor 83to ground I at 25. tThe line switch is openedpinterrupting the motor and heater circuit;

lVhile 1 the illustrated example constitutes; a particular embodiment ofmy invention, I" do not limitrmyself strictly to the details;

shown, since, 1 manifestly, the same may be p variedlcoiisiderablywithout departing from the spirit of the invention as defined in the 1appended claims." V

I claim as my invention: I '1. In an electric-car-heating system thecombi iation with an electric motor for propelling the car, a motorcircuit for supplying current to the motor, adine switch for the "motorcircuit, aresistor disposed outside the car, an *electric'heaterdisposed within the n car, aswitch for connecting either the heater orthe resistor in the motor circuit, of a cas- 'ingfor the heater, agrounding circuit for the casing, andime'ans responsive to current traiersingthe grounding circuit opening the line switch,

.2. In an electric-car-heating systempthe combination with an electricmotor for p ropelling the car, amotor circuit for supplying current :tothe motor, afilineiswitch for; the

a motor circuit, aresistor disposed outside the car, an electric heaterdisposedwitliin the car, a switch for connecting eitherthe heater orthe'resistor, in the motor circuit, of a casfor the heater, agrounding'cireuit for the.

casing, and means connected, in the grounding-circuit for openingtheline switchwhen current traverses the grounding circuit.

3'. loan eIectric-car-heatingsystem, the cornbinationwith anelectricmotor for propelling the car, a motor circuit for supplying current tothe motor, a line switch for the motor circuit, a resistor disposedoutsidethe car, an electric heater disposed Wltl'llIltllG car, aswitchforconnect ng either the heater or the resistor in the motor circuit,*ofa casing fortheheater, a groundingcircuit for the casing, and a trlppingcoilrfor said line switch connected in the grounding circuit.

4, In an electric-car-heating system, the

combinationwith an electricmotor for pro-;

pelling the car, a motor circuit for supplying current to the motor, andan electric heater disposedwithin the car,of a casing for the heater, agrounding circuit for the casing,

and means responsive to current traversing the grounding circuit foropening the line switcln '5. In an electric-careheating combination withan electric motor for propelling the car,a motor circuit for supplyingcurrent to the motor, and an electric heater disposed within the car, ofa conductingcasing for the heater, a grounding circuit for the casing,and meansresponsiveto currenttraw ersing the grounding circuit foropening to interrupt the motor circuit.

n In testimony whereof, I have hereunto subscribed my name this 3rd dayof August, 1927;

BAso M o. AUSTIN.

system, the

